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PartsTable / COMPONENT / 40321 PIECE 13
40321 PIECE 13 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include thread_direction: RIGHT-HAND, surface_treatment: CADMIUM OVERALL, nominal_thread_diameter: 0.500 INCHES IN, thread_quantity_per_inch: 13, thread_series_designator: UNIFIED NATIONAL COARSE (UNC). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-377-9560, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
40321 PIECE 13
NSN: 5305-01-377-9560
FSC: 5305
CAGE: 55378 — TRAC REGULATOR CO., INC. DBA TRAC REGULATOR CO INC (USA)
SPECIFICATIONS
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
nominal_thread_diameter0.500 INCHES IN
thread_quantity_per_inch13
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-01-377-9560
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 40321 PIECE 13 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD DIRECTION: RIGHT-HAND
•
SURFACE TREATMENT: CADMIUM OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
THREAD QUANTITY PER INCH: 13
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTCADMIUM OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH13
NOMINAL THREAD DIAMETER0.500 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
14419Interchangeable
interchangeable cross-reference
interchangeable
S-9100-0026Interchangeable
interchangeable cross-reference
interchangeable
10426Interchangeable
interchangeable cross-reference
interchangeable
2013AP-3FSJ24Interchangeable
interchangeable cross-reference
interchangeable
6515NCM093986Interchangeable
interchangeable cross-reference
interchangeable
62-9421-001Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40321 PIECE 13?
40321 PIECE 13 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 40321 PIECE 13?
There are 7 known substitutes for 40321 PIECE 13: 14419, S-9100-0026, 10426 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 40321 PIECE 13?
40321 PIECE 13 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-377-9560. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026